Long-distance continuous measurement method for soil body strength parameters of soft soil site

Abstract

The invention provides a long-distance continuous measurement method for soil body strength parameters of a soft soil site. The front end of a dragging device is provided with a soil body non-drainingshear strength measurement device, the dragging device actively or passively travels in a soft soil layer, it is guaranteed that a part of the dragging device penetrates into the to-be-measured soillayer during travelling, and the soil entering depth of the dragging device is controlled by adjusting a counterweight on the upper part of the dragging device and the dragging angle. According to theprovided method, the limitation that through a traditional single-point vertical measurement method, the continuous soil body strength parameters in the surface parallel direction cannot be obtainedis broken through, transverse long-distance continuous field measurement of the soil body strength can be completed through a one-time dragging test, and the measured strength parameters can be used for guiding design and construction of breakwater projects and projects such as submarine oil and gas pipelines, cables and optical cables. Especially, with the increasing development of deep-sea oil and gas resources, through the provided method, it is of great significance to measure the submarine soil body strength parameters and apply the submarine soil body strength parameters to design and stability evaluation of project facilities such as the submarine pipelines and the submarine cables.

Description

technical field [0001] The invention belongs to the fields of geotechnical engineering, geological engineering and the like, and relates to a long-distance continuous measurement method for soil strength parameters in soft soil sites. The method is especially suitable for underwater pipeline design and investigation of soil strength parameters before construction. Background technique [0002] Accurate measurement of soil strength parameters is the basis of all engineering implementation. As a kind of unfavorable geological soil, soft soil generally has the characteristics of high natural water content, large natural void ratio, high compressibility, low shear strength, small consolidation coefficient, long consolidation time, high sensitivity, and poor water permeability. Therefore, the design and construction risks of soft soil sites are relatively high. In engineering practice, realizing accurate measurement of soil strength parameters in soft soil sites is of great sign...

AI Technical Summary

Problems solved by technology

However, for large-scale and long-distance sites, this type of test method has been greatly restricted in practical application.

The change relationship of soil strength parameters within a certain area can be obtained by setting more vertical drilling points. However, due to the large increase in engineering costs and time caused by the increase in test points, this scheme becomes unsuitable in actual engineering. practical

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